package com.zkk.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zkk.reggie.common.CustomException;
import com.zkk.reggie.entity.Category;
import com.zkk.reggie.entity.Dish;
import com.zkk.reggie.entity.Setmeal;
import com.zkk.reggie.mapper.CategoryMapper;
import com.zkk.reggie.service.DishService;
import com.zkk.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryService extends ServiceImpl<CategoryMapper, Category> implements com.zkk.reggie.service.CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    /**
     * 根据ID删除分类，删除的前提条件是 是否有关联其他菜品和套餐
     * @param id
     */
    @Override
    public void remove(Long id) {

        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();

        //添加查询条件，根据分类id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        //1.查询当前分类是否已经关联了菜品
        int count1 = dishService.count(dishLambdaQueryWrapper);

        if (count1 > 0){
            //如果关联，抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品，不能删除！");
        }


        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();

        //添加查询条件，根据分类idj进行查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);

        //2.查询当前分类是否已经关联了套餐
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if (count2 > 0){
            //如果关联，抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐，不能删除！");
        }

        //正常删除分类
        super.removeById(id);
    }
}
